git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/delete.c

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 int
  17 bdb_delete( Operation *op, SlapReply *rs )
  18 {
  19         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  20         Entry   *matched;
  21         struct berval   pdn = {0, NULL};
  22         Entry   *e = NULL;
  23         Entry   *p = NULL;
  24         EntryInfo       *ei = NULL, *eip = NULL;
  25         int             manageDSAit = get_manageDSAit( op );
  26         AttributeDescription *children = slap_schema.si_ad_children;
  27         AttributeDescription *entry = slap_schema.si_ad_entry;
  28         DB_TXN          *ltid = NULL, *lt2;
  29         struct bdb_op_info opinfo;
  30
  31         u_int32_t       locker = 0;
  32         DB_LOCK         lock, plock;
  33
  34         int             noop = 0;
  35
  36 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
  37         Operation* ps_list;
  38 #endif
  39
  40 #ifdef NEW_LOGGING
  41         LDAP_LOG ( OPERATION, ARGS,  "==> bdb_delete: %s\n", op->o_req_dn.bv_val, 0, 0 );
  42 #else
  43         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  44                 op->o_req_dn.bv_val, 0, 0 );
  45 #endif
  46
  47         if( 0 ) {
  48 retry:  /* transaction retry */
  49                 if( e != NULL ) {
  50                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  51                         e = NULL;
  52                 }
  53 #ifdef NEW_LOGGING
  54                 LDAP_LOG ( OPERATION, DETAIL1,
  55                         "==> bdb_delete: retrying...\n", 0, 0, 0 );
  56 #else
  57                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  58                         0, 0, 0 );
  59 #endif
  60                 rs->sr_err = TXN_ABORT( ltid );
  61                 ltid = NULL;
  62                 op->o_private = NULL;
  63                 op->o_do_not_cache = opinfo.boi_acl_cache;
  64                 if( rs->sr_err != 0 ) {
  65                         rs->sr_err = LDAP_OTHER;
  66                         rs->sr_text = "internal error";
  67                         goto return_results;
  68                 }
  69                 ldap_pvt_thread_yield();
  70         }
  71
  72         /* begin transaction */
  73         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  74                 bdb->bi_db_opflags );
  75         rs->sr_text = NULL;
  76         if( rs->sr_err != 0 ) {
  77 #ifdef NEW_LOGGING
  78                 LDAP_LOG ( OPERATION, ERR,
  79                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  80                         db_strerror(rs->sr_err), rs->sr_err, 0 );
  81 #else
  82                 Debug( LDAP_DEBUG_TRACE,
  83                         "bdb_delete: txn_begin failed: %s (%d)\n",
  84                         db_strerror(rs->sr_err), rs->sr_err, 0 );
  85 #endif
  86                 rs->sr_err = LDAP_OTHER;
  87                 rs->sr_text = "internal error";
  88                 goto return_results;
  89         }
  90
  91         locker = TXN_ID ( ltid );
  92
  93         opinfo.boi_bdb = op->o_bd;
  94         opinfo.boi_txn = ltid;
  95         opinfo.boi_locker = locker;
  96         opinfo.boi_err = 0;
  97         opinfo.boi_acl_cache = op->o_do_not_cache;
  98         op->o_private = &opinfo;
  99
 100         if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 101                 dnParent( &op->o_req_ndn, &pdn );
 102         }
 103
 104         /* get entry */
 105         rs->sr_err = bdb_dn2entry( op->o_bd, ltid, &op->o_req_ndn, &ei, 1,
 106                 locker, &lock, op->o_tmpmemctx );
 107
 108         switch( rs->sr_err ) {
 109         case 0:
 110         case DB_NOTFOUND:
 111                 break;
 112         case DB_LOCK_DEADLOCK:
 113         case DB_LOCK_NOTGRANTED:
 114                 goto retry;
 115         case LDAP_BUSY:
 116                 rs->sr_text = "ldap server busy";
 117                 goto return_results;
 118         default:
 119                 rs->sr_err = LDAP_OTHER;
 120                 rs->sr_text = "internal error";
 121                 goto return_results;
 122         }
 123
 124         if ( rs->sr_err == 0 ) {
 125                 e = ei->bei_e;
 126                 eip = ei->bei_parent;
 127                 bdb_cache_find_id( op->o_bd, ltid, eip->bei_id, &eip,
 128                         0, locker, &plock, op->o_tmpmemctx );
 129         } else {
 130                 matched = ei->bei_e;
 131         }
 132         if ( eip ) {
 133                 p = eip->bei_e;
 134         }
 135
 136         if ( pdn.bv_len != 0 ) {
 137                 if( p == NULL || !bvmatch( &pdn, &p->e_nname )) {
 138 #ifdef NEW_LOGGING
 139                         LDAP_LOG ( OPERATION, DETAIL1,
 140                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 141 #else
 142                         Debug( LDAP_DEBUG_TRACE,
 143                                 "<=- bdb_delete: parent does not exist\n",
 144                                 0, 0, 0);
 145 #endif
 146                         rs->sr_err = LDAP_OTHER;
 147                         rs->sr_text = "could not locate parent of entry";
 148                         goto return_results;
 149                 }
 150
 151                 /* check parent for "children" acl */
 152                 rs->sr_err = access_allowed( op, p,
 153                         children, NULL, ACL_WRITE, NULL );
 154
 155                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 156                 p = NULL;
 157
 158                 if ( !rs->sr_err  ) {
 159                         switch( opinfo.boi_err ) {
 160                         case DB_LOCK_DEADLOCK:
 161                         case DB_LOCK_NOTGRANTED:
 162                                 goto retry;
 163                         }
 164
 165 #ifdef NEW_LOGGING
 166                         LDAP_LOG ( OPERATION, DETAIL1,
 167                                 "<=- bdb_delete: no write access to parent\n", 0, 0, 0 );
 168 #else
 169                         Debug( LDAP_DEBUG_TRACE,
 170                                 "<=- bdb_delete: no write access to parent\n",
 171                                 0, 0, 0 );
 172 #endif
 173                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 174                         rs->sr_text = "no write access to parent";
 175                         goto return_results;
 176                 }
 177
 178         } else {
 179                 /* no parent, must be root to delete */
 180                 if( ! be_isroot( op->o_bd, &op->o_ndn ) ) {
 181                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 182                                 || be_isupdate( op->o_bd, &op->o_ndn ) ) {
 183                                 p = (Entry *)&slap_entry_root;
 184
 185                                 /* check parent for "children" acl */
 186                                 rs->sr_err = access_allowed( op, p,
 187                                         children, NULL, ACL_WRITE, NULL );
 188
 189                                 p = NULL;
 190
 191                                 if ( !rs->sr_err  ) {
 192                                         switch( opinfo.boi_err ) {
 193                                         case DB_LOCK_DEADLOCK:
 194                                         case DB_LOCK_NOTGRANTED:
 195                                                 goto retry;
 196                                         }
 197
 198 #ifdef NEW_LOGGING
 199                                         LDAP_LOG ( OPERATION, DETAIL1,
 200                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 201 #else
 202                                         Debug( LDAP_DEBUG_TRACE,
 203                                                 "<=- bdb_delete: no access "
 204                                                 "to parent\n", 0, 0, 0 );
 205 #endif
 206                                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 207                                         rs->sr_text = "no write access to parent";
 208                                         goto return_results;
 209                                 }
 210
 211                         } else {
 212 #ifdef NEW_LOGGING
 213                                 LDAP_LOG ( OPERATION, DETAIL1,
 214                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 215 #else
 216                                 Debug( LDAP_DEBUG_TRACE,
 217                                         "<=- bdb_delete: no parent "
 218                                         "and not root\n", 0, 0, 0);
 219 #endif
 220                                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 221                                 goto return_results;
 222                         }
 223                 }
 224         }
 225
 226         if ( e == NULL ) {
 227 #ifdef NEW_LOGGING
 228                 LDAP_LOG ( OPERATION, ARGS,
 229                         "<=- bdb_delete: no such object %s\n", op->o_req_dn.bv_val, 0, 0);
 230 #else
 231                 Debug( LDAP_DEBUG_ARGS,
 232                         "<=- bdb_delete: no such object %s\n",
 233                         op->o_req_dn.bv_val, 0, 0);
 234 #endif
 235
 236                 if ( matched != NULL ) {
 237                         rs->sr_matched = ch_strdup( matched->e_dn );
 238                         rs->sr_ref = is_entry_referral( matched )
 239                                 ? get_entry_referrals( op, matched )
 240                                 : NULL;
 241                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 242                         matched = NULL;
 243
 244                 } else {
 245                         rs->sr_ref = referral_rewrite( default_referral,
 246                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 247                 }
 248
 249                 rs->sr_err = LDAP_REFERRAL;
 250                 send_ldap_result( op, rs );
 251
 252                 ber_bvarray_free( rs->sr_ref );
 253                 free( (char *)rs->sr_matched );
 254                 rs->sr_ref = NULL;
 255                 rs->sr_matched = NULL;
 256
 257                 rs->sr_err = -1;
 258                 goto done;
 259         }
 260
 261         rs->sr_err = access_allowed( op, e,
 262                 entry, NULL, ACL_WRITE, NULL );
 263
 264         if ( !rs->sr_err  ) {
 265                 switch( opinfo.boi_err ) {
 266                 case DB_LOCK_DEADLOCK:
 267                 case DB_LOCK_NOTGRANTED:
 268                         goto retry;
 269                 }
 270
 271 #ifdef NEW_LOGGING
 272                 LDAP_LOG ( OPERATION, DETAIL1,
 273                         "<=- bdb_delete: no write access to entry\n", 0, 0, 0 );
 274 #else
 275                 Debug( LDAP_DEBUG_TRACE,
 276                         "<=- bdb_delete: no write access to entry\n",
 277                         0, 0, 0 );
 278 #endif
 279                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 280                 rs->sr_text = "no write access to entry";
 281                 goto return_results;
 282         }
 283
 284         if ( !manageDSAit && is_entry_referral( e ) ) {
 285                 /* entry is a referral, don't allow delete */
 286                 rs->sr_ref = get_entry_referrals( op, e );
 287
 288 #ifdef NEW_LOGGING
 289                 LDAP_LOG ( OPERATION, DETAIL1,
 290                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 291 #else
 292                 Debug( LDAP_DEBUG_TRACE,
 293                         "bdb_delete: entry is referral\n",
 294                         0, 0, 0 );
 295 #endif
 296
 297                 rs->sr_err = LDAP_REFERRAL;
 298                 rs->sr_matched = e->e_name.bv_val;
 299                 send_ldap_result( op, rs );
 300
 301                 ber_bvarray_free( rs->sr_ref );
 302                 rs->sr_ref = NULL;
 303                 rs->sr_matched = NULL;
 304
 305                 rs->sr_err = 1;
 306                 goto done;
 307         }
 308
 309         /* nested transaction */
 310         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2,
 311                 bdb->bi_db_opflags );
 312         rs->sr_text = NULL;
 313         if( rs->sr_err != 0 ) {
 314 #ifdef NEW_LOGGING
 315                 LDAP_LOG ( OPERATION, ERR,
 316                         "bdb_delete: txn_begin(2) failed: %s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 317 #else
 318                 Debug( LDAP_DEBUG_TRACE,
 319                         "bdb_delete: txn_begin(2) failed: %s (%d)\n",
 320                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 321 #endif
 322                 rs->sr_err = LDAP_OTHER;
 323                 rs->sr_text = "internal error";
 324                 goto return_results;
 325         }
 326
 327         /* Can't do it if we have kids */
 328         rs->sr_err = bdb_cache_children( op, lt2, e );
 329         if( rs->sr_err != DB_NOTFOUND ) {
 330                 switch( rs->sr_err ) {
 331                 case DB_LOCK_DEADLOCK:
 332                 case DB_LOCK_NOTGRANTED:
 333                         goto retry;
 334                 case 0:
 335 #ifdef NEW_LOGGING
 336                         LDAP_LOG ( OPERATION, DETAIL1,
 337                                 "<=- bdb_delete: non-leaf %s\n", op->o_req_dn.bv_val, 0, 0 );
 338 #else
 339                         Debug(LDAP_DEBUG_ARGS,
 340                                 "<=- bdb_delete: non-leaf %s\n",
 341                                 op->o_req_dn.bv_val, 0, 0);
 342 #endif
 343                         rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
 344                         rs->sr_text = "subtree delete not supported";
 345                         break;
 346                 default:
 347 #ifdef NEW_LOGGING
 348                         LDAP_LOG ( OPERATION, ERR,
 349                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 350                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 351 #else
 352                         Debug(LDAP_DEBUG_ARGS,
 353                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 354                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 355 #endif
 356                         rs->sr_err = LDAP_OTHER;
 357                         rs->sr_text = "internal error";
 358                 }
 359                 goto return_results;
 360         }
 361
 362         /* delete from dn2id */
 363         rs->sr_err = bdb_dn2id_delete( op->o_bd, lt2, eip, e,
 364                 op->o_tmpmemctx );
 365         if ( rs->sr_err != 0 ) {
 366 #ifdef NEW_LOGGING
 367                 LDAP_LOG ( OPERATION, ERR,
 368                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 369                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 370 #else
 371                 Debug(LDAP_DEBUG_TRACE,
 372                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 373                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 374 #endif
 375                 switch( rs->sr_err ) {
 376                 case DB_LOCK_DEADLOCK:
 377                 case DB_LOCK_NOTGRANTED:
 378                         goto retry;
 379                 }
 380                 rs->sr_text = "DN index delete failed";
 381                 rs->sr_err = LDAP_OTHER;
 382                 goto return_results;
 383         }
 384
 385         /* delete from id2entry */
 386         rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
 387         if ( rs->sr_err != 0 ) {
 388 #ifdef NEW_LOGGING
 389                 LDAP_LOG ( OPERATION, ERR,
 390                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 391                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 392 #else
 393                 Debug(LDAP_DEBUG_TRACE,
 394                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 395                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 396 #endif
 397                 switch( rs->sr_err ) {
 398                 case DB_LOCK_DEADLOCK:
 399                 case DB_LOCK_NOTGRANTED:
 400                         goto retry;
 401                 }
 402                 rs->sr_text = "entry delete failed";
 403                 rs->sr_err = LDAP_OTHER;
 404                 goto return_results;
 405         }
 406
 407         /* delete indices for old attributes */
 408         rs->sr_err = bdb_index_entry_del( op, lt2, e );
 409         if ( rs->sr_err != LDAP_SUCCESS ) {
 410 #ifdef NEW_LOGGING
 411                 LDAP_LOG ( OPERATION, ERR,
 412                         "<=- bdb_delete: index failed: %s (%d)\n",
 413                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 414 #else
 415                 Debug( LDAP_DEBUG_TRACE,
 416                         "<=- bdb_delete: index failed: %s (%d)\n",
 417                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 418 #endif
 419                 switch( rs->sr_err ) {
 420                 case DB_LOCK_DEADLOCK:
 421                 case DB_LOCK_NOTGRANTED:
 422                         goto retry;
 423                 }
 424                 rs->sr_text = "entry index delete failed";
 425                 rs->sr_err = LDAP_OTHER;
 426                 goto return_results;
 427         }
 428         if ( TXN_COMMIT( lt2, 0 ) != 0 ) {
 429                 rs->sr_err = LDAP_OTHER;
 430                 rs->sr_text = "txn_commit(2) failed";
 431                 goto return_results;
 432         }
 433
 434 #if 0   /* Do we want to reclaim deleted IDs? */
 435         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 436         if ( e->e_id == bdb->bi_lastid ) {
 437                 bdb_last_id( op->o_bd, ltid );
 438         }
 439         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 440 #endif
 441
 442         if( op->o_noop ) {
 443                 if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
 444                         rs->sr_text = "txn_abort (no-op) failed";
 445                 } else {
 446                         noop = 1;
 447                         rs->sr_err = LDAP_SUCCESS;
 448                 }
 449         } else {
 450                 bdb_cache_delete( &bdb->bi_cache, e, bdb->bi_dbenv,
 451                         locker, &lock );
 452                 rs->sr_err = TXN_COMMIT( ltid, 0 );
 453         }
 454         ltid = NULL;
 455         op->o_private = NULL;
 456
 457         if( rs->sr_err != 0 ) {
 458 #ifdef NEW_LOGGING
 459                 LDAP_LOG ( OPERATION, ERR,
 460                         "bdb_delete: txn_%s failed: %s (%d)\n",
 461                         op->o_noop ? "abort (no-op)" : "commit", db_strerror(rs->sr_err), rs->sr_err );
 462 #else
 463                 Debug( LDAP_DEBUG_TRACE,
 464                         "bdb_delete: txn_%s failed: %s (%d)\n",
 465                         op->o_noop ? "abort (no-op)" : "commit",
 466                         db_strerror(rs->sr_err), rs->sr_err );
 467 #endif
 468                 rs->sr_err = LDAP_OTHER;
 469                 rs->sr_text = "commit failed";
 470
 471         } else {
 472 #ifdef NEW_LOGGING
 473                 LDAP_LOG ( OPERATION, RESULTS,
 474                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 475                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 476 #else
 477                 Debug( LDAP_DEBUG_TRACE,
 478                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 479                         op->o_noop ? " (no-op)" : "",
 480                         e->e_id, e->e_dn );
 481 #endif
 482                 rs->sr_err = LDAP_SUCCESS;
 483                 rs->sr_text = NULL;
 484         }
 485
 486 return_results:
 487         send_ldap_result( op, rs );
 488
 489 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
 490         if ( rs->sr_err == LDAP_SUCCESS && !noop ) {
 491                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 492                         bdb_psearch( op, rs, ps_list, e, LDAP_PSEARCH_BY_DELETE );
 493                 }
 494         }
 495 #endif
 496
 497         if(rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 498                 ldap_pvt_thread_yield();
 499                 TXN_CHECKPOINT( bdb->bi_dbenv,
 500                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 501         }
 502
 503 done:
 504         /* free entry */
 505         if( e != NULL ) {
 506                 if ( rs->sr_err == LDAP_SUCCESS ) {
 507                         bdb_entry_return( e );
 508                 } else {
 509                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 510                 }
 511         }
 512
 513         if( ltid != NULL ) {
 514                 TXN_ABORT( ltid );
 515                 op->o_private = NULL;
 516         }
 517
 518         return ( ( rs->sr_err == LDAP_SUCCESS ) ? noop : rs->sr_err );
 519 }